How to get current domain name in ASP NET

Question

I want to get the current domain name in asp net c    I am using this code   string DomainName   HttpContext Current Request Url Host    My URL is localhost 5858but it s returning only localhost    Now  I am using my project in localhost  I want to get localhost 5858   For another example  when I am using this domain   www somedomainname com   I want to get somedomainname com  Please give me an idea how to get the current domain name

User · Answer

You can try the following code     Request Url Host        Request Url IsDefaultPort              Request Url Port

User · Answer

You can try the following code to get fully qualified domain name   Request Url Scheme   System Uri SchemeDelimiter   Request Url Host

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HttpContext Current Request Url Host is returning the correct values  If you run it on www somedomainname com it will give you www somedomainname com  If you want to get the 5858 as well you need to use   HttpContext Current Request Url Port

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I use it like this in asp net core 3 1  var url  Request Scheme  quot     quot   Request Host Value

User · Answer

Try getting the    left part    of the url  like this   string domainName   HttpContext Current Request Url GetLeftPart UriPartial Authority     This will give you either http   localhost 5858 or https   www somedomainname com whether you re on local or production  If you want to drop the www part  you should configure IIS to do so  but that s another topic   Do note that the resulting URL will not have a trailing slash

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Here is a screenshot of Request RequestUri and all its properties for everyone s reference

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Using Request Url Host is appropriate - it s how you retrieve the value of the HTTP Host  header  which specifies which hostname  domain name  the UA  browser  wants  as the Resource-path part of the HTTP request does not include the hostname   Note that localhost 5858 is not a domain name  it is an endpoint specifier  also known as an  authority   which includes the hostname and TCP port number  This is retrieved by accessing Request Uri Authority   Furthermore  it is not valid to get somedomain com from www somedomain com because a webserver could be configured to serve a different site for www somedomain com compared to somedomain com  however if you are sure this is valid in your case then you ll need to manually parse the hostname  though using String Split      works in a pinch   Note that webserver  IIS  configuration is distinct from ASP NET s configuration  and that ASP NET is actually completely ignorant of the HTTP binding configuration of the websites and web-applications that it runs under  The fact that both IIS and ASP NET share the same configuration files  web config  is a red-herring

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To get base URL in MVC even with subdomain www somedomain com subdomain   var url      Request Url GetLeftPart UriPartial Authority   Url Content

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Here is a quick easy way to just get the name of the url                      var urlHost   HttpContext Current Request Url Host               var xUrlHost   urlHost Split                   foreach var thing in xUrlHost                                if thing     www   amp  amp  thing     com                                         urlHost   thing

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www somedomain com is the domain host  The subdomain is an important part  www  is often used interchangeably with not having one  but that has to be set up as a rule  even if it s set by default  because they are not equivalent  Think of another subdomain  like mx   That probably has a different target than www    Given that  I d advise not doing this sort of thing  That said  since you re asking I imagine you have a good reason   Personally  I d suggest special-casing www  for this   string host   HttpContext Current Request Url GetComponents UriComponents HostAndPort  UriFormat Unescaped     if  host StartsWith  www         return host Substring 4   else     return host    Otherwise  if you re really 100  sure that you want to chop off any subdomain  you ll need something a tad more complicated   string host         int lastDot   host LastIndexOf        int secondToLastDot   host Substring 0  lastDot  LastIndexOf        if  secondToLastDot  gt  -1      return host Substring secondToLastDot   1   else     return host    Getting the port is just like other people have said

User · Answer

the Request ServerVariables object works for me  I don t know of any reason not to use it   ServerVariables  SERVER NAME   and ServerVariables  HTTP URL   should get what you re looking for

User · Answer

Try this    Request Url GetLeftPart UriPartial Authority

[c#] How to get current domain name in ASP.NET

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